BOIC-exHC - Barring of Outgoing International Calls except those directed to the Home PLMN Country

A cellular supplementary service, that when invoked sets flags in the network databases to stop a subscriber making international calls apart from those to their HPLMN (Home Public Land Mobile Network).


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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